Electrically-heated tile stove



Dec. 11, 1928.

F. GRAF ELECTRICALLY HEATED TILE STOVE Filed June 26, 1924 Bil Patented Dec. 11, 1928.

UNITED STATES PATENT OFFICE.

FRANZ GRAF, 0F BADEN, SWITZERLAND.

ELECTRICALLY-HEATED TILE STOVE.

Application filed June 26, 1924, Serial No. 722,611, and in Switzerland July 3, 1923.

This invention has for its object to provide an llTlPI'OVQd electrically heated tile stove wherein the electrical heating elements are local, id in the cavity of the several tile units. This arrangement has great advan- Lagos.

A constructional form of an improved stove according to this invention is illustrated by way of example in the accompany ing drawings in which Figure 1 is vertical longitudinal section and Figure 2 a cross-section thereof.

The lll'lDlOVQfl stove is composed of three layers each of tour pot-shaped tiles (1', the n'iiddle layer consisting of three tiles and a hot cupboard I). The tiles oi? the two lower rows are provided with a heat-storing filling of sand that covers completely the heating resistance d which is located in the interior ct each tile. Above the heating resistance (2 of the upper layer of tiles there is located for the purpose of serving as a heat storage device, a block of steatite f with sufficient play 5/ to allow the heated air tofiow past it directly into the apartment to be heated. The hot cupboard b is made of iron.

The tiles are placed upon one another without cement. and they may be held together in the several horizontal layers by clamps II. which are fastened in the passage holes In the absence of cement jointing, this method of assembly, owing to the irregulririty ot the tile surface, ensures interstices between contiguous tiles for the circulation of air. The improved stove is covered with an iron cover plate 11 and stands on an iron foot or bed plate m in the interior of which the main electrical terminals 1 are located in a very accessible but also well protected manner.

At the top there is arranged a damper (1 which may be composed of a fixed plate and a movable plate, both of heat-storing material, for instance a mixture of asbestos and cement known as eternite, so that the damper itself serves as a heat-storing device. By means of this damper the warm air can be retained in the interior of the stove, more particularly in the interstices between the several pots according to requirement, or it may be delivered as a continuous current into the apartment to be heated.

Collector bars 1) lead to the electrical connections of the heating elements (2 and e in 'one another or side by side.

the several tiles through a passage 0 formed by shallow grooves in the sides of the tiles rom the main terminals n. For the purpose of making different electrical conmartious more than two collector bars will naturally be required. The connections of the resistances (Z and c is effected by way of the apertures 2'. By suitable known electrical .sr. itching devices. single parts of the store may be arranged to be thrmvn into and out of operation separately.

()wing to the in'lprovcd stove being built up of single l'ieating cells the said stove is not only vc y readily transportable. but also it can be d vided up into units eacn capable Oil indep ident healing. Even each single tile-pot 12' he used by itself for heating an apartment or an article. The improved stove can also be sub-divided into two. three or more partstoves each of which is composed ot a group of tiles so that with sin- {gle stove one apartment can be heated to a l ;h temperature for instance in cold weather. and a plurality of apartments can be heated to a lower temperature when the weather is warmer. On the other hand by building up further tile-pots the output of the improved stove can be increased afterwards on the spot to any desired extent.

Owing to the fact that each single tile can be provided with a heating element the structure of the improved stove is not limited to the usual conventional forms.

For example the tiles may be placed in a single layer or even in a single row upon In this manner the floor may be laid with these tiles, or a wall. may be covered with them. If the wall is replaced by a wall composed of heating tiles, this arrangement allows of heating two rooms at one and the same time. Furthen more, the apartment, or single pieces of furniture, may be bordered with a row of tiles, or the tiles may be placed on a cornice or on a bracket. Pillars and columns may also be built up of the tiles which may serve for instance as a casing for T-iron supports. Finally, the tiles may be placed upon one another in the form of steps or benches or other fancy shapes may be formed therewith.

In many of the above mentioned eases care must be taken that the temperature of the tiles does not exceed a determined maxi mum. The heating according to the deand in such a case therefore the heat elements mav le omitted from SOEHQ The YfililOUS -r-; may lie the ti leg heated,

e-material. for iistance samh enclosing heat ng element. i the other '11 at a current at the heatal Fl t l" stove a tnve capacity. an (-l'lecc which an increase h lczii'inw' he from wall at all or some of #he li es t 0-1 by ccvciring the 0pc; suhstitutin metal new it is possihle to obtain w elatmcc, it an 69.8)"

a or the llllPlOYCCl tion to deltac0nnecti0n in the case of threenhase current.

lVhat I claim is:

l. in electrical hating stove comprising a plurality o'l. interchangeahle rectangular cup-shaped units, each of said units containing; a heating element and being filled with granular material, and a plurality 01'? connecting) means: on the sides of each of Silltl units enacting" with ccri" minding connect- IllQElllli on adjacent units.

2. in electrical heating; clove as claimed in claim 1 whereinanyone 01'' said heating elemcnti may he electrically disconnected tram the 0%, we 0t said heating elements.

An elcciri all heating store as claimed in claim l wherein the hollow units are termed with apertures :t-ur the passage of electric connecting leads.

al. in electrical heating stove as claimed in claim l. wherein all the units are formed with Yertical greevcs which cea all to term a vertical ara-age for the reception of electrical supply leads.

Rm electrical heating stove as claimed in claim 1 wherein all the units are formed with vertical fjjl'OOYOS which ceact to form :1 en. pzwsage for the reception of elecrical supply leads, said electrical supply eadr being; united to form collector bars.

An elect 'ical heating stove as claimed wherein the uppermostlayer of in. claim l. hollow units is covered by a plate of heatstoring material.

.lmoii y whereof I have signed my name to this specification.

FRANZ GRAF. 

